20259442902 has 8 divisors (see below), whose sum is σ = 40518885816. Its totient is φ = 6753147632.

The previous prime is 20259442897. The next prime is 20259442921. The reversal of 20259442902 is 20924495202.

It is a sphenic number, since it is the product of 3 distinct primes.

20259442902 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1688286903 + ... + 1688286914.

It is an arithmetic number, because the mean of its divisors is an integer number (5064860727).

Almost surely, 2^20259442902 is an apocalyptic number.

20259442902 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20259442902 is a wasteful number, since it uses less digits than its factorization.

20259442902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376573822.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 20259442902 in words is "twenty billion, two hundred fifty-nine million, four hundred forty-two thousand, nine hundred two".